Reflashing involves working with sensitive electronics. A wrong fuse setting can permanently "lock" the ATmega162, requiring a high-voltage parallel programmer to fix. Always double-check your connections and ensure your power source is stable.
Plug your USBASP into your PC and connect it to the cable's ISP header. Power the cable (some programmers provide 5V, others require you to plug the cable into a car or a 12V supply—be careful not to double-power!). Step B: Erase and Set Fuses Before loading new firmware, you must clear the old data. Open your programming software (e.g., ). Select ATmega162 from the chip list.
Go to . You should see "Interface Found!" and "Status: Ready." Safety Warning vcds atmega162 reflash
Some cables use a 16V8B or GAL chip alongside the ATmega. If your cable has a "locked" FTDI chip, you might also need to reflash the FT232RQ/RL chip using MProg or FT_Prog via USB. 4. The Reflashing Process (Step-by-Step) Step A: Connect and Identify
0xFF (Note: These may vary depending on the specific loader version you are using.) Step C: Flash the Firmware Load the Flash (.hex) file into the buffer. Load the EEPROM (.eep) file into the buffer. Click Write/Program . Verify the write was successful. Step D: FTDI Configuration (If Necessary) Reflashing involves working with sensitive electronics
Set the "Fuses." For most VCDS clones, the standard fuse bits are: Low: 0xCD High: 0x19
A cheap AVR programmer to connect your PC to the ATmega162 chip. Plug your USBASP into your PC and connect
Tools like progisp , AVRDUDE , or ExtremeBurner are commonly used to push the data. 3. Preparing the Hardware
Most VCDS PCBs have a 6-pin ISP (In-System Programming) header. If not, you may need to solder wires directly to the pins or use a "pogo pin" adapter.
If your computer sees the device as "Unknown" or "USB Serial Port" instead of "Ross-Tech Direct USB," you need to flash the FTDI chip. Use to change the Vendor ID (VID) and Product ID (PID) to match Ross-Tech standards (usually VID 0403, PID FA20). 5. Testing the Result Once flashed, put the cable back together and: Install the VCDS version compatible with your firmware. Run the VCDS Loader (often required for clone cables).